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Preview: Electronics Infoline

Electronics Infoline

A giant collection of electronics projects and schematics on the web!

Last Build Date: Mon, 24 Oct 2016 22:44:40 +0000


Interfacing AD7865 Parallel ADCs to ADSP-2136x SHARC® Processors

Mon, 24 Oct 2016 20:00:04 +0000


Pinned onto EEWeb

This application note explains how to interface parallel ADCs to ADSP-21365 SHARC® processors. The parallel ADC considered in this application note is the AD7865. The two schemes described in this application note to interface an AD7865 with an ADSP-21365 are the parallel port interface and the parallel data acquisition port (PDAP) interface. This application note […](image)

A custom-made interactive condo for your entertainment

Mon, 24 Oct 2016 16:08:11 +0000


Pinned onto Arduino Blog

For those living in a high-rise, have you ever wondered what was going on behind the closed blinds of your neighbor’s home directly across from you? Caretaker is a concept project that explores just that. It consists of a custom-made switch board with which you can control the lights of the flats opposite of yours, providing active entertainment that stimulates […](image)

Linear MOSFET and its use in electronic load

Mon, 24 Oct 2016 14:47:48 +0000

Pinned onto Dangerous Prototypes

Kerry Wong writes, “In this video, I discussed some limitations of regular power MOSFETs when operating in linear region and demonstrated the superior performance of linear MOSFETs as electronic load.” More details at Kerry Wong’s blog. Kerry Wong writes, “In this video, I discussed some limitations of regular power MOSFETs when operating in linear region and […](image)

Heatmap motion analysis of autonomous robot

Mon, 24 Oct 2016 04:01:14 +0000


Pinned onto KoruKesu

I have always wanted to ease my daily life and obtain vacuum robot. Many things were stopping for a while, but finally found a local company which provides demo units so could not resist taking one for a spin. Selected Vorwerk VR200 for testing and brought home. What a good chance to run some computer vision […](image)

App note: Magnetometer placement in mobile devices

Sun, 23 Oct 2016 17:00:40 +0000


Pinned onto Dangerous Prototypes

Correct magnetometer placement app note from Kionix. Link here (PDF) Electronic devices contain many parts which can affect a magnetic sensor. When deciding the mounting position, it is necessary to consider the types of materials and the amount of current carried in proximity of the magnetic sensor. Accuracy of an electronic compass depends upon getting […](image)

App note: Embedded orientation detection using the MMA8450Q

Sun, 23 Oct 2016 13:00:51 +0000


Pinned onto Dangerous Prototypes

NXP’s accelerometer chip MMA8450Q, provides orientation detection on handheld devices. Link here (PDF) This application note targets the portrait/landscape orientation detection feature which has become standard in many hand-held electronic devices. Additionally, this application note aims to explain uses as well as highlight some of the challenges of designing an embedded algorithm into the sensor. […](image)

Simulating a Xerox Alto with the ContrAlto simulator: games and Smalltalk

Sat, 22 Oct 2016 16:15:00 +0000


Pinned onto Ken Shirrif

The revolutionary Xerox Alto computer came out in 1973 and set the direction for personal computing. If you want to try out the Alto’s software, the easiest approach is the ContrAlto simulator. This article describes how to set up the ContrAlto simulator, explains where to find Alto disk images, and shows some of the programs […](image)

App note: Practical considerations of Trench MOSFET stability when operating in linear mode

Sat, 22 Oct 2016 15:21:43 +0000


Pinned onto Dangerous Prototypes

Practical considerations of Trench MOSFET stability when operating in linear mode, application note (PDF!) from Fairchild Semiconductor This application note focuses on the factors affecting the thermal instability condition of a trench MOSFET device in Linear Mode. In particular, it studies the phenomenon when the drain current (Id) focusing process occurs that leads to a localized […](image)

15W Transmitter Power Amplifier 88-108MHz

Fri, 21 Oct 2016 20:53:22 +0000


Pinned onto Electrtonics DIY

The power amplifier boosts 88-108MHZ 1-2W FM transmitter’s power to 15 W. It includes multi-level low pass filter and has a high conversion efficiency with strong Yi-wave suppression. With good antena expected transmission coverage is at least 15Km. It uses high power 175 MHZ 4A 25W 2SC1972 RF transistor that must to be mounted to […](image)

RF Sampling ADC With 800 MHz of IBW LTE

Fri, 21 Oct 2016 18:30:44 +0000


Pinned onto EEWeb

The family of ADC32RFx5 is a dual-channel 14-bit analog to digital converter (ADC) and provides 3 Gsps of ADC sample rate. This device has a total of 8 lane JESD204B interfaces, 4-lane per ADC, with a maximum input bit rate of 12.3 Gbps. ADC32RFx5 supports JESD204B subclass 1 for multi-chip synchronization by using SYSREF. Up […](image)

HC-12 433MHz wireless serial communication module configuration

Fri, 21 Oct 2016 03:53:54 +0000


Pinned onto Dangerous Prototypes

Dziku  writes: HC-12 are cheap 433MHz wireless serial port communication modules with a range up to 1800m in open space. Each costs about $5 when bought from China, and 2 of them can create wireless UART link that can be used, for example, to transfer telemetry data from UAV. Or drive IoT device. Or connect […](image)

Cutting cable with scissors and Arduino

Thu, 20 Oct 2016 19:16:03 +0000


Pinned onto Arduino Blog

2PrintBeta solves the problem of cutting multiple cables with an innovative scissors setup. At times, the 3D printing and engineering company 2PrintBeta needs to cut wires and other assorted materials to length. Sure, they could simply cut them by hand, but that takes time and their business is growing. An industrial cable cutter is quite […](image)

Guide for BMP180 barometric sensor with Arduino

Thu, 20 Oct 2016 16:10:55 +0000


Pinned onto Dangerous Prototypes

A how-to on using the BMP180 barometric sensor with the Arduino from Random Nerd Tutorials: The BMP180 barometric sensor (model GY-68) is the one in the following figure (front and back view). It is a very small module with 1mm x 1.1mm (0.039in x 0.043in). It measures the absolute pressure of the air around it. It […](image)

Light intensity meter using AT89C52 microcontroller

Thu, 20 Oct 2016 05:48:31 +0000


Pinned onto Dangerous Prototypes

AM Bhatt over at Engineers Garage writes: In the given project, LDR is used to measure light intensity inside the room. With a minor change in the circuit, it can be used to measure outdoor light intensity also. It uses microcontroller AT89C52 and LCD to display light intensity. It also indicates how much light inside […](image)

Lightweight and Scalable 4x Oversampling Asynchronous Data Recovery Unit

Wed, 19 Oct 2016 21:00:44 +0000


Pinned onto EEWeb

This application note describes a method for capturing asynchronous communication using SelectIO™ interface primitives. The method consists of oversampling the data with a clock of similar frequency (< ±10,000 ppm), taking multiple samples of the input data at different phases, and processing these to get a sample of the data at the most ideal point […](image)

FlipFrame is a rotating digital picture frame

Wed, 19 Oct 2016 13:03:35 +0000


Pinned onto Arduino Blog

With Timothy Giles’ rotating digital picture frame, you’ll never have to endure black bars around your vertical images again! Rather than accept the poor presentation of vertical images that normal displays offer, Giles instead made his own out of a discarded 27-inch LCD TV. A Raspberry Pi displays the images sideways, then uses an Arduino […](image)

Shining Back liveset blows your mind with light and sound

Wed, 19 Oct 2016 07:01:07 +0000


Pinned onto Arduino Blog

Last year, we featured an awesome audiovisual project from ANGLE that applied videomapping techniques to their livesets. Now, the Florence-based duo is back with their latest A/V system, “Shining Back,” which was designed in collaboration with JoinT Studio’s Stefano Bonifazi. Essentially, it’s a grid structure consisting of LED lights that pulse in a geometric matrix to the duo’s live rhythms. The installation runs on an Arduino Uno and […](image)

AF amplifier plus line out — Jupiter Modular Receiver

Tue, 18 Oct 2016 21:19:00 +0000


Pinned onto QRPHB

SECTION 6  —  AF amplifier plus line outClick for the Master Index to this project It’s fun and useful to listen to your signals from Jovian reception adventures. Along with electromagnetic Jovian bursts, you may also hear bad noise like RFI or hum which might not glare apparent on your monitor. I designed and built […](image)

Invent Your Future with the Arduino 101

Tue, 18 Oct 2016 20:32:18 +0000


Pinned onto Arduino Blog

Just days after celebrating the Arduino 101‘s first birthday at Maker Faire Rome, we’ve partnered with Hackster, Intel, and Seeed Studio to launch an exciting new contest. We’re challenging you to unleash the powers of the Intel® Curie™ Module-based board and “Invent Your Future.” Perhaps you want to build an autonomous boat for collecting ocean pollution data, or a […](image)

Main receiver with 2 outputs — Jupiter Modular Receiver

Tue, 18 Oct 2016 19:31:00 +0000


Pinned onto QRPHB

SECTION 5  —  Main receiver with 2 outputsClick for the Master Index to this project I crafted a simple DC receiver.  At some point, I might design and build a phasing ( ZIF receiver ) to supplant this module. Above — I placed addition low-pass filtration on the input to allow receiver use with lesser […](image)

Local Oscillator — Jupiter Modular Receiver

Tue, 18 Oct 2016 18:29:00 +0000


Pinned onto QRPHB

SECTION 4  —  Local OscillatorClick for the Master Index to this project This year, I built and designed 3 local oscillators, however, this VXO leads in simplicity. Click for my synthesizer for Jupiter receivers. Above — Entire schematic for the VXO. 2 standard value crystals in “super VXO” format provide a delta F of 135 […](image)

Input filter and preamplifier — Jupiter Modular Receiver

Tue, 18 Oct 2016 06:19:00 +0000


Pinned onto QRPHB

SECTION 3  —  Input filter and preamplifierClick for the Master Index to this project Above — Build of the input and RF preamplifier stage. I put in a 0 or 6 dB attenuator right at the input. That’s double-sided Cu+ board with copper vias joining the 2 surfaces intermittently and also at crucial ground points. […](image)

Antenna — Jupiter Modular Receiver

Tue, 18 Oct 2016 04:50:00 +0000


Pinned onto QRPHB

SECTION 2  —  AntennaClick for the Master Index to this project Like for amateur radio and SWL DXing, the antenna ranks as somewhere between important and crucial in amateur radio astronomy. The current most recommenced antenna for monitoring Jupiter and perhaps the galactic background = a pair of dipoles with a power combiner plus a […](image)

Classic Vintage Vacuum Tube Oscillator

Tue, 18 Oct 2016 03:16:14 +0000


Pinned onto Gadgetronicx

The above you see is a result of my work in which i tried to go Vintage with my design. I was talking about the usage of Vacuum tubes when i mention the word Vintage, am pretty sure you will agree to it as well. This vacuum tube oscillator can be used for testing purposes […](image)


Tue, 18 Oct 2016 03:10:00 +0000


Pinned onto Freetronics

Have you ever thought it would be interesting to track food consumption? Foodie is an IoT project that tracks your food usage over time. The project uses a number of weight sensors connected to an Arduino and Raspberry Pi to monitor the contents of your pantry or fridge. By creating a network of weight sensors […](image)

Introduction and block diagram of all the modules — Jupiter Modular Receiver

Tue, 18 Oct 2016 02:48:00 +0000


Pinned onto QRPHB

SECTION 1  —  Introduction and block diagram of all the modulesClick for the Master Index to this project You’ll find many good homebrew receivers offered for Jupiter reception and I add 1 more design to the fray. Click for the NASA list of Receivers for Radio Jove. A treasure trove of information lies at the […](image)

A touchless MIDI controller for your electric guitar

Mon, 17 Oct 2016 21:54:17 +0000


Pinned onto Arduino Blog

If guitar effects pedals aren’t really your thing, perhaps Evan Kale’s touchless MIDI controller will fit the bill. Using an Arduino, along with a Colpitts oscillator and some other electronics, Kale has come up with a rather unique interface for his guitar. Instead of using a foot pedal, he put a strip of aluminum foil inside […](image)

Square Off is a chess board with a high-tech twist

Mon, 17 Oct 2016 20:53:27 +0000


Pinned onto Arduino Blog

If you love chess, but aren’t thrilled about playing it on an app, the InfiVention team has just the board for you. The origin of the game chess is a fascinating and somewhat unknown tale, stretching continents and many hundreds of years. In the last 25 or so years, however, it has gone from a game played on a […](image)

82571EB/82572EI Gigabit Ethernet Controller Design Guide

Mon, 17 Oct 2016 20:00:03 +0000


Pinned onto EEWeb

The Intel® 82571/82572 Gigabit Ethernet Controller is a single, compact component that offers either one (82572) or two (82571) fully integrated Gigabit Ethernet Media Access Control (MAC) and physical layer (PHY) ports. This device uses the PCI Express* (PCIe) architecture (Rev. 1.0a). The Intel 82571/82572 Gigabit Ethernet Controller enables single- or dual-port Gigabit Ethernet implementation […](image)

Gnat-Stats, Tiny OLED PC performance monitor

Mon, 17 Oct 2016 15:08:01 +0000


Pinned onto Dangerous Prototypes

Rupert Hirst writes: After a recent purchase of a Nvidia GTX1080 graphics card, 4k monitor plus Doom(2016), I thought it would be great to see some external telemetry… from my exorbitant purchase. Then, I Stumbled upon on Psyrax’s “Serialmonitor” GitHub repository! Armed with an Arduino ProMicro plus a 128×64 pixel OLED display, I compiled the source […](image)

Smartwatch prototype turns your wrist into a joystick

Mon, 17 Oct 2016 14:42:06 +0000


Pinned onto Arduino Blog

Although smartwatches were designed to be an easy-to-use alternative for your smartphone, interacting with their touchscreens still requires your opposite hand to be free. So what do you do when you’re carrying a bag of groceries or holding onto a bus handle? This is the problem a Dartmouth-led team set out to solve with WristWhirl, a smartwatch prototype that uses the wrist wearing […](image)

ESP8266 Weather Station Color code published

Sun, 16 Oct 2016 19:26:07 +0000


Pinned onto Squix Techblog

If you don’t mind code which is a little bit rough around the edges you can start experimenting with the code for the color weather station. I just published it on Github. You  can find it here: I used a display almost identical to this one: 2.2 Inch Serial TFT SPI Display ILI9341 Buy one using this […](image)

App note: Understanding linear resonant actuator characteristics

Sun, 16 Oct 2016 17:00:36 +0000


Pinned onto Dangerous Prototypes

Application note about Linear Resonant Actuators from Precision Microdrives. Link here Linear Resonant Actuators (LRAs) are becoming more popular for haptic applications. They are an alternative to eccentric rotating mass vibration motors and have several distinct advantages. For example they have better haptic performance characteristics and are more efficient. For these reasons they are used […](image)

App note: Driving linear resonance vibration actuators

Sun, 16 Oct 2016 13:00:15 +0000


Pinned onto Dangerous Prototypes

Linear resonance vibration actuators are great alternative to Eccentric rotating mass (ERM) motors, these are both used to vibrate handheld devices such as cellphones, driving LRAs is not the same as driving ERMs for such that LRA needs a specific resonant frequency. More on these on Precision Microdrives’ link here. Linear Resonance Actuators (LRA) use […](image)

Skill Sunday: Stacking Arduino Shields

Sun, 16 Oct 2016 07:58:00 +0000


Pinned onto Freetronics

One of the great things about Arduino is the ability to expand your board using shields. Shields are boards which plug into your Arduino and provide all sorts of additional capabilities. Interestingly, you can even “stack” shields so that you can have lots of different combinations of added features. Whilst it might look easy to […](image)

App note: Between the Amplifier and the ADC – Managing filter loss in communications systems

Sun, 16 Oct 2016 00:27:25 +0000


Pinned onto Dangerous Prototypes

An application note (PDF!) from TI on optimizing the filter design to minimize the losses: Filtering plays an essential part in nearly all communications systems. Removing unwanted signals is part of system design to eliminate unwanted noise or distortion. The signal presented to the analog to digital converter should have no spurs or distortion products, especially […](image)

Restoring YC’s Xerox Alto day 10: New boards, running programs, mouse problems

Sat, 15 Oct 2016 15:43:00 +0000


Pinned onto Ken Shirrif

Last week our vintage Alto was crashing; we traced the problem to an incompatibility between two of the processor boards. Today we replaced these boards and now we can run all the programs on the disk without crashes. Unfortunately our mouse still doesn’t work, which limits what we can do on this GUI-based computer. We […](image)

MPPT solar charger

Fri, 14 Oct 2016 20:30:16 +0000


Pinned onto Dangerous Prototypes

Lukas Fässler has designed and built an MPPT solar charger: One of my main goals with this design is to archieve very low standby current, somewhere in the tens of microamps. The basis for this is a low-power buck on the basis of a Texas TPS62120 where the microcontroller can switch the output voltage between […](image)

Low Power User Interface

Fri, 14 Oct 2016 18:55:09 +0000


Pinned onto Soldernerd

As you may have noticed I’m quite busy working on the MPPT Solar Charger project. The latest version uses a 4 lines x 20 characters LCD that connects via I2C as well as a rotary encoder with a push button. While the display got its own little board, the encoder connected directly with the solar […](image)

Test Methodology of Error Detection and Recovery using CRC in Altera FPGA Devices

Fri, 14 Oct 2016 06:30:17 +0000


Pinned onto EEWeb

This application note describes how to use the enhanced error detection cyclic redundancy check (CRC) feature in the Arria® II, Stratix® III, Stratix IV, Arria V, Cyclone® V, and Stratix V devices. It also describes the test methodology you can use when testing the capability of this feature in the supported devices. Arria V, Cyclone […](image)

Arduino Mega EPROM programmer

Fri, 14 Oct 2016 02:00:31 +0000


Pinned onto Dangerous Prototypes

An Arduino Mega Eprom Programmer project from Robson Couto, that is available on github: Recently I acquired a SNES. But it only came with a bootleg Mortal Kombat cartridge. Searching for games I found a lot of repro cartridges (Cartridges with the ROM swapped) being sold at local second hand selling websites. The problem is […](image)

University of Washington develops a self-driving tricycle

Thu, 13 Oct 2016 19:43:17 +0000


Pinned onto Arduino Blog

Autonomous cars seem to get all of the attention, but this autonomous trike is hoping to take things in a different direction. With the support of Amazon’s Catalyst program, as well as from software company Kerika, University of Washington Bothell professor Tyler Folsom’s self-driving tricycle aims to help us lessen our dependence on fossil fuels. It’s a neat […](image)

Collector is “a kind of reality re-mixer”

Thu, 13 Oct 2016 15:55:58 +0000


Pinned onto Arduino Blog

For his latest project, Dmitry Morozov (aka ::vtol::) has created a robotic machine that uses a microphone to record sounds from its surrounding environment, selecting only the loudest ones. Then, the aptly named “Collector” pieces these noises together in the order they were recorded to create an algorithmic  composition. First, the Collector records the sounds until it has gathered […](image)

Smart Garden Pot

Thu, 13 Oct 2016 00:45:00 +0000


Pinned onto Freetronics

If you love gardening you might find this project useful. This smart garden pot lets you keep track of soil moisture and automatically waters your plants for you. An Arduino is used to interface between a humidity sensor and a relay which turns on  a pump which provides water to your plants! Hendra Kusumah who […](image)

PDB182-GTRB Blend-Balance Guitar Potentiometers in Bass Guitars

Wed, 12 Oct 2016 21:00:01 +0000


Pinned onto EEWeb

Electric guitar manufacturing is a multi-billion dollar industry with major manufacturers established worldwide. From the introduction of the first mass-produced electric guitar in 1950, guitarists have been mesmerized with advances in technology and the wide array of after market parts commercially available for guitar upgrades. Specialty products such as the Bourns® PDB182-GTRB allow the guitarist […](image)

Ping Pong FM is a fun, musical take on table tennis

Wed, 12 Oct 2016 14:48:26 +0000


Pinned onto Arduino Blog

If you thought table tennis was hard enough, wait until you see what Mark Wheeler and a team of designers have come up with. Ping Pong FM puts a Guitar Hero-like spin on the classic sport. However, unlike the actual game, Ping Pong FM is more collaborative than competitive. That’s because players must hit the ball back and forth to keep the music […](image)

Check the traffic autonomously on a modified clock

Tue, 11 Oct 2016 22:12:12 +0000


Pinned onto Arduino Blog

Using an Arduino and 1Sheeld, Integreight embedded engineer Eslam Ali set his office clock up to preview the traffic going home. If you work in a traffic-prone area, there’s always a debate at to whether you should go home at the normal time or wait a few minutes to leave and avoid the traffic. To help make that […](image)

This Arduino G meter shows how fast your car really is!

Tue, 11 Oct 2016 18:55:56 +0000


Pinned onto Arduino Blog

Using an Arduino with an accelerometer, this handy display lets you know how “extreme” your driving really is! Modern cars tell us all kinds of information about how our vehicles are working and how you are driving. One thing that is generally missing is a display that tells you how many “G’s” (or how much you […](image)

Restoring YC’s Xerox Alto day 9: tracing a crash through software and hardware

Tue, 11 Oct 2016 15:56:00 +0000


Pinned onto Ken Shirrif

Last week, after months of restoration, we finally got the vintage Xerox Alto computer to boot (details) and run programs. However, some programs (such as the mouse-based Draw program) crashed so we knew there must still be a hardware problem somewhere in the system. In today’s session we traced through the software, microcode and hardware […](image)

The AtHeart 4Duino combines Arduino, Wi-Fi and touchscreen

Tue, 11 Oct 2016 09:24:37 +0000


Pinned onto Arduino Blog

A new season, a new partner! We’ve had our sights set on 4D Systems’ touchscreen product for quite some time, and we’re excited to finally introduce that this Arduino and Genuino-compatible product is joining the AtHeart program. The 4Duino-24 is a 2.4-inch, 240×320-pixel Intelligent Display Module with Wi-Fi capabilities. “For years Arduino/Genuino users have been taking […](image)

Control Your Lego Trains with Arduino

Tue, 11 Oct 2016 05:53:00 +0000


Pinned onto Freetronics

Have you ever thought that it would be awesome to combine the capabilities of Lego with Arduino? This is exactly what TiagoStantos has done with his Arduino controlled Lego train system. The Arduino is used to enable the train to sound a whistle as it approaches the station and when stop at the platform. The […](image)

17 Watt Hi-Fi Vacuum Tube Amplifier

Tue, 11 Oct 2016 04:03:58 +0000


Pinned onto Gadgetronicx

Vacuum tubes seems to be primitive and considered to no longer in existence stuffs. But trust me there are still places where Vacuum tubes are considered pretty handy. On that basis i have come up with a design of a simple Vacuum tube amplifier which is capable of delivering output power of 17 Watts.  Let’s […](image)

Raspberry Pi RF frequency counter

Tue, 11 Oct 2016 01:38:48 +0000


Pinned onto Dangerous Prototypes

A Raspberry PI RF frequency counter project from Scott Harden, that is available on GitHub: Raspberry PI RF Frequency Counter with Python Interface. The RF signal clocks a 32-bit counter (SN74LV8154) connected to a 16-bit IO expander (MCP23017) accessable to the Raspberry Pi (via I²C) to provide real-time frequency measurements from a python script. More details […](image)

Design Guidelines for High-Performance, Multichannel, Simultaneous-Sampling ADCs

Mon, 10 Oct 2016 20:00:36 +0000


Pinned onto EEWeb

This application note will help the designer of a high-performance, multichannel, simultaneous sampling data-acquisition system (DAS). It explains how to select the proper components and place them on the PCB to achieve optimum performance. Maxim's MAX1308, MAX1320, and MAX11046 simultaneous sampling ADCs are featured. Test data illustrate the benefits of following the guidelines. Many advanced […](image)

Citizen Scientist & Build Season 18 begins in 1 week

Mon, 10 Oct 2016 18:00:00 +0000


Pinned onto QRPHB

Greetings! To help convert to amateur radio astronomy, I needed to brush up on many science topics. I spent much of the summer reading and asking questions about topics that ranged from astrochemistry, parabolic antenna design, general astronomy and pulsars, to Jovian planet RF research from both space probes and earth labs. Soaked with science, […](image)

Tutorial: RFID tags with the NXP NFC controller PN7120 and Eclipse

Mon, 10 Oct 2016 15:45:30 +0000


Pinned onto Dangerous Prototypes

Erich Styger writes: Playing with RFID and NFC is definitely fun, and they are everywhere! For a research project I’m exploring different RFID tags and solutions. I several types around for a long time, but never found the time to actually work on it, so last nightI thought I give it a try, and I […](image)

App note: Implementing an I2C reset

Sun, 09 Oct 2016 17:00:53 +0000


Pinned onto Dangerous Prototypes

Interesting app note from Analog Devices when an I2C communication is broken under some circumstances. Link here (PDF) The I2C bus is a high integrity, robust serial bus used for control purposes in many systems. The primary components that make up a system are at least one master and one slave. Under normal conditions, everything […](image)

App note: Environmental compensation on the AD7142: The effects of temperature and humidity on capacitance sensors

Sun, 09 Oct 2016 13:00:50 +0000


Pinned onto Dangerous Prototypes

An old but useful application from Analog Devices about things that can affect touch/capacitance sensors. Link here (PDF) Capacitance sensing has the potential to replace current user input mechanisms in consumer devices. Products as diverse as cell phones, digital cameras, MP3 players, and other portable media players are all suitable for implementing capacitance sensing. Capacitance […](image)

Skill Sunday: Reading Resistor Colour Codes

Sat, 08 Oct 2016 22:52:00 +0000


Pinned onto Freetronics

Resistors are a fundamental part of almost all electronic circuits. Regardless of if you are working on some Arduino Disco Lights or building a Breadboard Arduino you will need to make sure that you are using the right resistors! To help you learn about how to determine the value of through hole resistors we have […](image)

5 V, 2.5 A Power Supply for Non-Isolated PoE

Sat, 08 Oct 2016 14:00:05 +0000


Pinned onto EEWeb

To meet the increasing demands for non-isolated Power over Ethernet (PoE) power solutions, Maxim has developed innovative, non-isolated PoE powered device (PD) power solutions. Each design was tested for load and line regulation, as well as efficiency and transient performance. As with all Maxim reference designs, the BOM, schematics, layout files, and Gerber files are […](image)

Speed-Control Techniques in AC-DC Operated BLDC Applications

Fri, 07 Oct 2016 18:30:42 +0000


Pinned onto EEWeb

To achieve energy efficiency, ceiling fans and ventilation fans are moving from simple alternate-current (AC) induction motors to brushless direct-current (DC) motors (BLDC). An AC-operated BLDC motor requires two sections to run the BLDC motor: the AC-DC power conversion section and the DC to 3-phase AC conversion section. The Texas Instruments reference design, TIDA-00652, helps […](image)

An isolated analog output for Arduino Uno

Fri, 07 Oct 2016 00:47:10 +0000


Pinned onto Dangerous Prototypes

Giovanni Carrera writes: This project completes the series of my articles about the Arduino analog I/O with the aim to use it as a controller of small automation systems. In control systems of the industrial plants it is always advisable to isolate both the inputs and the outputs coming from the field. This prevents disturbances […](image)

A 3D-printed reimagined Game Boy prototype

Thu, 06 Oct 2016 19:45:02 +0000


Pinned onto Arduino Blog

With a shape reminiscent of a Game Gear, revised controls and hardware, Anthony Campusano’s rig looks extremely fun! As reported on, Campusano’s Game Boy-inspired prototype was quite the crowd-pleaser at World Maker Faire in New York. Although wider than it is tall (like most portables to follow), and with many more buttons, this handheld console […](image)

Keep your cat entertained with an automated laser tower

Thu, 06 Oct 2016 12:32:43 +0000


Pinned onto Arduino Blog

As any cat owner can tell you, our feline friends love chasing the uncatchable dot of a laser pointer. Unfortunately, though, there is only so much time in the day that you can spend playing with them and catering to their natural instincts… so why not automate the process? This is exactly what La Fabrique DIY decided […](image)

Binary clock

Thu, 06 Oct 2016 01:53:42 +0000


Pinned onto Dangerous Prototypes

Frederick Vandenbosch made a binary clock with Raspberry Pi Zero and Unicorn pHAT. He documented the whole process on his blog: At the center of the project are a PiZero and a Unicorn pHAT. The PiZero fetches the time, converts it to binary and controls the Unicorn pHAT with a Python script. The Unicorn pHAT’s […](image)

Arduino Morse Code Reader

Wed, 05 Oct 2016 21:21:00 +0000


Pinned onto Freetronics

Are you fascinated by morse code? With this interesting project from Hackerje you can use an LCD and some push buttons to build your own morse decoder. The decoder reads in your “dots and dashes” and converts them into plain text. With this project not only can you learn about Arduino programing but you can […](image)

A sheet metal Arduino MP3 alarm clock

Wed, 05 Oct 2016 15:23:40 +0000


Pinned onto Arduino Blog

Wake up to your favorite tunes using this beautiful sheet metal alarm clock! If you need to get up for work, class, or simply to avoid wasting the day away, setting an alarm is the obvious solution. Sure, you could buy a clock or just use your phone, but if you build Dejan Nedelkovski’s Arduino-based device, you […](image)

Build your own electronic drum kit using an Arduino Mega

Wed, 05 Oct 2016 14:54:29 +0000


Pinned onto Arduino Blog

If you’d like to save some money on a drum kit, this one is made using an Arduino Mega, MDF, and even a left sandal! Drum kits can be quite expensive, Maker Victor Herrero has created his own nine-piece set with readily-accessible components. Arduino code was modified from another project by Evan Kale, and is available for […](image)

eFUSE Programming on a Device Programmer

Wed, 05 Oct 2016 09:00:18 +0000

Pinned onto EEWebThis application note provides the file preparation instructions for programming the eFUESE in Zynq®-7000 All Programmable (AP) SoC devices on a device programmer. Device programmers are effective for high-volume, off-board device programming and preprogramming and securing sensitive data in the eFUSE before devices are sent for assembly at a board contract manufacturing site. In Zynq-7000 AP […] [...]

Where To Buy Electronic Components?

Wed, 05 Oct 2016 03:41:32 +0000

Pinned onto Build Electronic CircuitsThere’s a bunch of places to buy electronic components. Myself, I love to go to a brick-and-mortar store to buy components, because then I can get them without waiting. Unfortunately, many cities don’t have these anymore. So what do you do? The solution: Buy electronic components online. And if you’ve never bought components before, check […] [...]

A dual sensor fan controller build

Wed, 05 Oct 2016 02:20:37 +0000

Pinned onto Dangerous PrototypesKerry Wong has designed and built a dual sensor fan controller: To make the design more useful, one channel is marked as optional (see components with * on the silkscreen) so that you can build either a single sensor fan controller or a dual sensor one. With two sensors, the control signal is or’d with both […] [...]

Automatic volume tracking for a TV

Wed, 05 Oct 2016 01:31:03 +0000

Pinned onto Dangerous PrototypesAn automatic volume tracker by KA7OEI: It occurred to me that I did have a reference on which I could base an outboard volume control: The internal speakers of the TV. I surmised that I could “listen” to the audio level coming out of the speakers and based on that, adjust the volume of an outboard amplifier. […] [...]

An electro-mechanical drawing machine driven by music

Tue, 04 Oct 2016 19:18:16 +0000

Pinned onto Arduino BlogWe’ve been waiting to see what ::vtol:: (a.k.a. Dmitry Morozov) would come up with the next! The Moscow-based hacker artist has now created an electro-mechanical drawing machine. The Electropollock, which pays homage to influential American painter Jackson Pollock, is driven by the sound of music. A special algorithm analyzes the tunes and then controls the electric valves, servo motors with […] [...]

Deltu is a gaming robot with a personality

Tue, 04 Oct 2016 13:40:38 +0000

Pinned onto Arduino BlogInteractive designer Alexia Léchot has built a delta robot with a ‘personality’ that interacts with humans through iPads. Deltu uses three moving arms, a couple Unity3d applications, and Arduino to play simple mimicking games. According to Creative Applications: The system uses two Unity3d applications where the application of the human sends HTTP request to the computer. There is also a Python server that sends […] [...]

Arduino Synthesizer

Tue, 04 Oct 2016 04:21:00 +0000

Pinned onto FreetronicsUnknown to many, the humble Arduino is capable of generating and outputting sounds. With this cool project from audreyobscura you can build your own Arduino Synthesizer. The project uses a number of potentiometers to control various parameters such as pitch, gain and decay.  The project includes in depth instructions which go beyond the electronics and […] [...]

Transmitting I²S Audio Streams in Automotive Applications

Mon, 03 Oct 2016 20:00:48 +0000

Pinned onto EEWebThis application note describes how to transmit I²S audio data streams between two audio components across a single, shielded twisted-pair (STP) wire using the MAX9205 10-bit LVDS serializer and the MAX9206 10-bit LVDS deserializer. Low-voltage differential signaling—the most effective interface for in-vehicle digital video routing—can also be used as a low-cost solution to transmit digital […] [...]

How I added 6 characters to Unicode (and you can too)

Mon, 03 Oct 2016 19:35:00 +0000

Pinned onto Ken ShirrifStar characters (☆★) have long been part of the Unicode standard, which means they can appear as characters in web pages, text, and email. But half-stars were missing, so they required special images or custom fonts. I recently co-wrote a proposal to add half-star characters to Unicode, and it was just accepted. In the next […] [...]

RC2014/LL and RC2016/10

Mon, 03 Oct 2016 12:05:31 +0000

Pinned onto Dangerous PrototypesScott Lawrence has written an article detailing his Z80 homebuilt computer, the RC2014: The RetroChallenge is upon us again! This time around, I plan on working on my Z80 homebuilt computer, the RC2014. (Website for RC2014, Order a RC2014) For a few months now, I’ve had my RC-2014 computer built, and modified to be an RC2014/LL […] [...]

App note: Implementing a line frequency meter

Sun, 02 Oct 2016 17:00:35 +0000

Pinned onto Dangerous PrototypesCircuit from Murata about line frequency measurement utilizing Murata’s DMS series digital voltmeters, LM2917 frequency-to-voltage converter and a transformer for isolation. Link here (PDF) Circuit from Murata about line frequency measurement utilizing Murata’s DMS series digital voltmeters, LM2917 frequency-to-voltage converter and a transformer for isolation. Link here (PDF) Read more Here [...]

App note: Engineering scaling

Sun, 02 Oct 2016 13:00:14 +0000

Pinned onto Dangerous PrototypesScaling large values to be fed on limited input digital meters, application note from Murata. Link here (PDF) It is oftentimes necessary to attenuate “large” input signals down to a level that more closely matches the input range of a selected meter. For example, suppose the signal to be measured is 19 Volts, and the input […] [...]

Heart-rate and Pulse Oximetry Monitor

Sat, 01 Oct 2016 13:59:21 +0000

Pinned onto EEWebThe MAXREFDES117# reference design is a low power, optical heart-rate module complete with integrated red and IR LEDs, and a power supply. This tiny board, perfect for wearable projects, may be placed on a finger or earlobe to accurately detect heart rate. This versatile module works with both Arduino and mbed platforms for quick testing, […] [...]

Review of NeoDen 4 pick and place machine with vision system

Sat, 01 Oct 2016 04:56:31 +0000

Pinned onto Dangerous PrototypesRay Wang wrote up a review of NeoDen 4 pick and place machine with built-in vision system: Recently NeoDen released a new model called NeoDen 4 — it’s their first desktop model that has built-in computer vision system. The vision-based alignment makes it possible to place fine-pitched components with minimal manual work. It has four pick […] [...]

Solar LED Light ,20000mah Li-ion battery , 24V solar panel with MPPT charge Controller

Fri, 30 Sep 2016 19:00:00 +0000

Pinned onto CircuitvalleyThis project is the final part in Making a really powerful Solar Light , in this project we intigrate LTC3478 Based philips lumileds Driver and BQ24650 Based MPPT Solar Li-Ion charge Controller. We will be using total 3 9 Watt each LED Driver boards and One charge controller to charge 6 Cell 7.6V 20000mah li-lion […] [...]

Transfer of TI’s Wi-Fi® Alliance (WFA) Certifications to SimpleLink™ Wi-Fi CC3x00

Fri, 30 Sep 2016 18:30:17 +0000

Pinned onto EEWebThis document explains how to employ the Wi-Fi® Alliance (WFA) derivative certification transfer policy to transfer a WFA certification, already obtained by Texas Instruments, to a system you have developed. Texas Instruments has obtained WFA certification for its SimpleLink™ Wi-Fi CC3100 and CC3200 wireless chips and modules. End products which users create that use the CC3100 […] [...]

DIY USB 5V Solar Power Pack

Fri, 30 Sep 2016 16:56:49 +0000

Pinned onto Electrtonics DIYSolar energy is renewable, free, widely available and clean form of energy. It is considered as a serious source of energy for many years because of the vast amounts of energy that is made freely available, if harnessed by modern technology. Many people are familiar with so-called photovoltaic cells, or solar panels, found on things […] [...]

Tutorial: DHT22 sensor with a PICmicro

Thu, 29 Sep 2016 21:48:23 +0000

Pinned onto Dangerous PrototypesGianni Bernardo has published a tutorial for usage of DHT22 sensor with a PICmicro (machine translation). Tutorial about DHT22 / AM2302 Digital Humidity and Temperature sensor usage on picmicro, using XC Compiler. Code is for a PIC12F1822, data from sensor are formatted and sent on UART @9600baud Source code is available on github. Via the contact […] [...]

BQ24650 Based MPPT li-ion Battery Chage Controller With Software MPPT adjust and 3 Channel LED PWM dimming.

Thu, 29 Sep 2016 18:41:00 +0000

Pinned onto CircuitvalleyIn the addition to the little solar lighting project that i was working on i have created this little solar charge controller to charge lithium ion battery (li-ion). In the addition to the little solar lighting project that i was working on i have created this little solar charge controller to charge lithium ion battery […] [...]

Play beautiful music on an Arduino thumb piano

Thu, 29 Sep 2016 18:00:15 +0000

Pinned onto Arduino BlogWith an accelerometer and capacitive sensing, even a beginner can produce some great tunes with this DIY device. If you like making beautiful music, but would rather not actually practice this skill, perhaps this thumb piano and controller by producer/DJ Rob Blazey would be a good instrument to pick up. His project, called “Kalimbo,” employs an Arduino […] [...]

Kids can build these circuits

Thu, 29 Sep 2016 16:00:39 +0000

Pinned onto Build Electronic CircuitsI received an email from Brandon today. He writes: [Brandon]: I purchased your beginner course yesterday ( […] I’m hoping to use this to bring electronics into classrooms around Denver. I’d like to have them build circuits together in small groups. Do you have any recommendations on different circuits depending on their age? Thanks [Oyvind]: […] [...]

40 dB attenuator

Thu, 29 Sep 2016 15:56:14 +0000

Pinned onto Dangerous PrototypesA 40 dB attenuator project by Hartmut DK5LH. Hartmut uses the attenuator to measure the power of his transmitter (2 watts) with a power meter for -80 dBm to -10 dBm The attenuator is used to reduce the output power of the set to a value that is less than 0.1 milliwatt. (-10 dBm) More details at PA1B’s […] [...]

A multimeter heads-up display with Arduino glasses

Thu, 29 Sep 2016 13:11:03 +0000

Pinned onto Arduino BlogWith Alain Mauer’s Arduino glasses and a Bluetooth multimeter, electrical data is always in view! If you’re in a job where you have to take readings inside a live electrical panel, one thing that’s inconvenient, and even dangerous at times, is having to look away from your hands to read your multimeter. With hopes of […] [...]

Robotic fish swims under Arduino control

Thu, 29 Sep 2016 12:52:01 +0000

Pinned onto Arduino BlogThis robotic fish is made from bent PVC pipe and moves its tail for locomotion. If you’re going to build an underwater vehicle, propeller control is the conventional solution. Eric Dirgahayu, however, created his underwater creature in the form of a fish, complete with a tail that powers it through the water, and pectoral fins that could, […] [...]

Arduino Xylophone

Thu, 29 Sep 2016 04:31:00 +0000

Pinned onto FreetronicsIf you love playing music and making electronics, why not combined these interests and create your own Arduino musical instrument? Instructables member audreyobscura has put together a fantastic set of instructions detailing how you can build your own xylophone. The xylophone uses piezo sensors to detect when each note has been hit and then uses […] [...]

MPPT Solar Charger Testing

Wed, 28 Sep 2016 21:49:22 +0000

Pinned onto SoldernerdIn a previous post I have presented a design for an MPPT Solar Charger. In the mean time I have built a prototype and also wrote some software for it. So today I’ll go through my findings of what works well and what needs to be improved. And yes, there are some flaws in the […] [...]

Design and Application Guide of Bootstrap Circuit for High-Voltage Gate-Drive IC

Wed, 28 Sep 2016 21:00:58 +0000

Pinned onto EEWebThe purpose of this paper is to demonstrate a systematic approach to design high-performance bootstrap gate drive circuits for high-frequency, high-power, and high-efficiency switching applications using a power MOSFET and IGBT. It should be of interest to power electronics engineers at all levels of experience. In the most of switching applications, efficiency focuses on switching […] [...]

ESLOV is the amazing new IoT invention kit from Arduino

Wed, 28 Sep 2016 15:18:28 +0000

Pinned onto Arduino BlogFor years, the open-source philosophy of Arduino has been the inspiration to robots, drones, medical and space research, interactive art, musical instruments, 3D printers, and so much more. Now, Arduino is on a mission to radically simplify the way you build smart devices. Introducing ESLOV, a revolutionary plug-and-play IoT invention kit. ESLOV consists of intelligent modules that join […] [...]

μPC1237 based 2 channel speaker protector

Tue, 27 Sep 2016 17:04:20 +0000

Pinned onto Dangerous PrototypesDilshan Jayakody has published a new build: When working with expensive speaker system, speaker protector is an essential item to avoid any damages to speakers. In this project we build low cost speaker protector by using NEC’s μPC1237 IC. The circuit in this project is based on μPC1237 datasheet and it is specifically modified to […] [...]

ESP8266 WeatherStation Color

Tue, 27 Sep 2016 05:51:37 +0000

Pinned onto Squix TechblogYesterday I started playing around with a TFT color display connected to the ESP8266. First I adapted example code to download BMP files to the flash memory, and boy, this display has some nice intense colors! To get an idea how a color version of the Weatherstation would look like I got a little creative […] [...]

Keyless piano project using Arduino uno

Tue, 27 Sep 2016 05:03:20 +0000

Pinned onto GadgetronicxKeyless piano using Arduino is sort of sequel to the DIY fun piano i have published in this website. In this project i have eliminated the need of buttons involved to play the piano. Here i have used IR in place of buttons. Let’s get into the construction and building part of this project. PARTS […] [...]

IoT Wardrobe

Mon, 26 Sep 2016 23:06:00 +0000

Pinned onto FreetronicsThis intelligent wardrobe system automatically reminds you of the types of clothing and accessories you will  need based on the weather! Not only does it provide these recommendations,  but using a clever LED indicator system it also reminds you of where the different items you will require are located! For example the wardrobe might recommend that you […] [...]